#ROI(region of interest),感兴趣区域
#从被处理的图像以方框、园、不规则多边形等方式，勾勒出需要处理的区域

import cv2
import numpy as np

a = cv2.imread("966760155050624.jpg")
b=np.ones((101,101,3))
b = a[220:400,250:350]
a[0:80,0:100] = b

cv2.imshow("original",a)
cv2.waitKey(0)
cv2.destroyAllWindows()
